Smallpox vaccination: a review, part I. Background, vaccination technique, normal vaccination and revaccination, and expected normal reactions.

Because smallpox could be a factor in bioterrorism, the United States has provided guidelines for smallpox vaccination of certain members of the population, including health care workers and first responders, as well as military personnel. A plan for more extensive vaccination, if it is needed in the event of a bioterrorist attack, is being developed under the aegis of the Centers for Disease Control and Prevention. The characteristics of smallpox vaccine, the technique of administration, and the expected reactions to primary vaccination and revaccination are outlined in this article.